Instructions: Using a nonreactive bowl, marinate the fish for 30 minutes in the juice of 5 limes with salt and pepper. Chop the tomatoes, onion, cilantro and serrano peppers and mix them together with the olive oil. Add the tequila to that mix. Strain fish and add it to the mixture. Add the juice of remaining lime. Chop the mango and the avocado and add them on top.